Garmite is an exceptionally rare potassium silicate mineral identified from alkaline pegmatites in the Garm region of Tadzhikistan. It typically forms small, tabular, transparent crystals that are often difficult to distinguish from common associated silicates without professional mineralogical testing.
Is this garmite?
5-step field checkRun through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.
- 1Test the hardnessTry to scratch garmite with a known reference. Garmite sits at Mohs 3.5 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Garmite leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Garmite typically shows a vitreous luster.
- 4Match the color rangeCompare against the expected color range: white, colorless, gray.
- 5Look at form & habitCrystal system: orthorhombic. Typical habit: tabular crystals.
Often found alongside garmite
Minerals reported to co-occur with garmite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- K₂Si₂O₅
- Mohs hardness
- 3.5
- Density
- 2.8 g/cm³
- Streak
- White
- Luster
- Vitreous
- Transparency
- Transparent
- Crystal system
- Orthorhombic
- Crystal habit
- Tabular Crystals
- Cleavage
- Perfect
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Alkaline Pegmatites
- Typical price
- $50-300 per specimen
Where rockhounds find garmite
Classic worldwide localities
- Garma sub-district, Tadzhikistan
Field-hunting tip
Look in alkaline pegmatites country — that is the host setting where garmite typically forms. If you start seeing quartz, k-feldspar in float, you are in the right ground. Field specimens usually show a tabular crystals habit, so train your eye for that shape before scanning the outcrop.
Common questions
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Find garmite on the map
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